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422 giacomo 1 
/*
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 *  smb_fs_sb.h
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 *
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 *  Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
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 *  Copyright (C) 1997 by Volker Lendecke
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 *
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 */
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#ifndef _SMB_FS_SB
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#define _SMB_FS_SB
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <linux/smb.h>
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/*
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 * Upper limit on the total number of active smb_request structs.
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 */
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#define MAX_REQUEST_HARD       256
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enum smb_receive_state {
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        SMB_RECV_START,         /* No data read, looking for length + sig */
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        SMB_RECV_HEADER,        /* Reading the header data */
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        SMB_RECV_HCOMPLETE,     /* Done with the header */
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        SMB_RECV_PARAM,         /* Reading parameter words */
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        SMB_RECV_DATA,          /* Reading data bytes */
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        SMB_RECV_END,           /* End of request */
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        SMB_RECV_DROP,          /* Dropping this SMB */
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        SMB_RECV_REQUEST,       /* Received a request and not a reply */
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};
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/* structure access macros */
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#define server_from_inode(inode) SMB_SB((inode)->i_sb)
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#define server_from_dentry(dentry) SMB_SB((dentry)->d_sb)
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#define SB_of(server) ((server)->super_block)
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struct smb_sb_info {
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        /* List of all smbfs superblocks */
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        struct list_head entry;
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        enum smb_conn_state state;
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        struct file * sock_file;
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        int conn_error;
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        enum smb_receive_state rstate;
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        atomic_t nr_requests;
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        struct list_head xmitq;
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        struct list_head recvq;
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        u16 mid;
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        struct smb_mount_data_kernel *mnt;
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        /* Connections are counted. Each time a new socket arrives,
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         * generation is incremented.
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         */
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        unsigned int generation;
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        pid_t conn_pid;
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        struct smb_conn_opt opt;
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        struct semaphore sem;
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        unsigned short     rcls; /* The error codes we received */
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        unsigned short     err;
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        unsigned char      header[SMB_HEADER_LEN + 20*2 + 2];
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        u32                header_len;
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        u32                smb_len;
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        u32                smb_read;
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        /* We use our own data_ready callback, but need the original one */
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        void *data_ready;
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        /* nls pointers for codepage conversions */
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        struct nls_table *remote_nls;
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        struct nls_table *local_nls;
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        struct smb_ops *ops;
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        struct super_block *super_block;
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};
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static inline int
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smb_lock_server_interruptible(struct smb_sb_info *server)
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{
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        return down_interruptible(&(server->sem));
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}
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static inline void
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smb_lock_server(struct smb_sb_info *server)
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{
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        down(&(server->sem));
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}
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static inline void
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smb_unlock_server(struct smb_sb_info *server)
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{
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        up(&(server->sem));
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}
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#endif /* __KERNEL__ */
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#endif